<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <script src="/static/js/jquery.js"></script>
</head>
<body>
<style>
  html,body{margin:0px; padding:0px;}
</style>
<nav style="width:100%; height:50px; background:#eee;">asdasd</nav>